Manji Manii
Member
- Joined
- Oct 19, 2024
- Messages
- 9
Hi, new here, by I may slightly understand another issue here, oxygen sensors can pick up on the outside of the ceramic material from combustion on the upstream from the spark plugs and on the down stream from the catalytic converter.
When dismantling the sensors, I would test the outer nickel casings by polishing off the casings with aluminum oxide and then dissolve samples of that in AR and test with stannous chlorides.
Most German cars use iridium 95% and 2.5% palladium and 2.5% rhodium.
Your results might be from contamination from the iridium spark plugs used and the palladium and rhodium catalytic converter.
Of course, there is also the zinc and carbon electrodes which could contaminate the inside of the sensor.
When dismantling the sensors, I would test the outer nickel casings by polishing off the casings with aluminum oxide and then dissolve samples of that in AR and test with stannous chlorides.
Most German cars use iridium 95% and 2.5% palladium and 2.5% rhodium.
Your results might be from contamination from the iridium spark plugs used and the palladium and rhodium catalytic converter.
Of course, there is also the zinc and carbon electrodes which could contaminate the inside of the sensor.
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